Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A peptide isolated from the brain tissue of rats conditioned to fear darkness, alleged to induce a similar fear in untrained rats, thereby implying that a memory or a conditioned response can be chemically transferred.

Etymologies

scotophob(ia) + -in.
(American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

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